Hop up arms not long enough?

Skara

Skara

Members
Joined
Oct 20, 2017
Messages
3,277
Reaction score
1,294
Heya,

Just bought a prommy blue bucking and a couple of flat nubs for my arp, and I noticed that the hop arm doesn't push down enough to have any sort of effect ? (using the stock G&G rotary chamber)..

is there anything I'm missing?

 
The Prommy Blue and Black are shite.

Better off flat hopping the Standard G&g green.

Have you the prommy flat nubs? Might be worth trying the Biro mod with them.

 
What flat nubs?

The blue hop rubber is fine, there were a couple of bad batches but been ok in the last year. Just make sure it is new stock.

 
Are you sure the nub isn't catching on the window in the hop unit/barrel? They can sometimes need a bit of trimming.

 
Adolf Hamster said:
Are you sure the nub isn't catching on the window in the hop unit/barrel? They can sometimes need a bit of trimming.
Click to expand...
Click to shrink...
Already trimmed.

It does the same with the standard tubular nub that comes with G&G greens. Fully dialed in yet it only applies barely enough hop to lift .25s..

I will update this post tomorrow with a couple of sketches so you guy get an idea (cba to take down the hop again)

 
Last edited by a moderator:
Skara said:
Already trimmed.

It does the same with the standard tubular nub that comes with G&G greens. Fully dialed in yet it only applies barely enough hop to lift .25s..

I will update this post tomorrow with a couple of sketches so you guy get an idea (cba to take down the hop again)
Click to expand...
Click to shrink...


i think i get what you mean, although i'm surprised you're getting it with a standard type hop unit, normally it's the pro-win/madbull style ones have trouble with not enough lift

 
Skara said:
Already trimmed.

It does the same with the standard tubular nub that comes with G&G greens. Fully dialed in yet it only applies barely enough hop to lift .25s..
Click to expand...
Click to shrink...
There is a small hole through the top of the nub put a piece of bar through it so that part of the nub cant compress. Also when doing a flat hop it works best if you angle the window on the barrel. This allows the rubber to push through with less tension. Also check the width not just the length of the nub.

Failing that add a spacer.

 
Last edited by a moderator:
ImTriggerHappy said:
There is a small hole through the top of the nub put a piece of bar through it so that part of the nub cant compress. Also when doing a flat hop it works best if you angle the window on the barrel. This allows the rubber to push through with less tension. Also check the width not just the length of the nub.

Failing that add a spacer.
Click to expand...
Click to shrink...
What do you mean by angling the barrel?

Adolf Hamster said:
i think i get what you mean, although i'm surprised you're getting it with a standard type hop unit, normally it's the pro-win/madbull style ones have trouble with not enough lift
Click to expand...
Click to shrink...
I also found the same problem with a Retro Arms CNC'd hop chamber and a Modify flat bucking + nub.

It's me being either completely retarded or extremely unlucky with my purchases ?

 
Skara said:
I also found the same problem with a Retro Arms CNC'd hop chamber and a Modify flat bucking + nub.

It's me being either completely retarded or extremely unlucky with my purchases ?
Click to expand...
Click to shrink...


yeah, the pro win seems to have the biggest lift of the aftermarket ones, but not as much as a default style.

you could look at the maple leaf macaron or rhopping, more meat inside to account for the lack of travel.

 
You must log in or register to reply here.
Back
Top